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Area code 301 was the first area code for all of Maryland, from 1947, when the area code system was created, until 1991, when everything from Baltimore eastward split off as area code 410. In 1997, area code 240 was added as an overlay area code for the 301 territory. On June 14, 2023, a third overlay code, 227, was added to provide more ...
The blue area is assigned area codes 301, 240, and 227; the red area is area codes 410, 443 and 667. The state of Maryland is served by the following area codes:
The structure of the numbering system of the public switched telephone network is geographic, with number portability, as follows: [1] DN + NDC + SN = NSN = NJ XPQ MCDU DN (Network code) = NJ NDC (Numbering area) = XPQ SN (Subscriber number) = MCDU For landlines, 3J XPQ MCDU where J cannot be 0.
A phone number communicates a lot --and if you dig a little deep, an area code contains information about the economic situation of its residents, too.
Scam phone numbers and area codes typically involve calls you receive from numbers you don’t recognize. Often there is no customer service you can contact or law enforcement you can involve for ...
Scam phone numbers: International Area Codes with a +1 Country Code. 232—Sierra Leone. 242 — Bahamas. 246 — Barbados. 268 — Antigua. 284 — British Virgin Islands. 345 — Cayman Islands.
Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.
Mobile phones use geographic area codes (two digits): after that, all numbers assigned to mobile service have nine digits, starting with 6, 7, 8 or 9 (example: 55 15 99999–9999). 90 is not possible, because collect calls start with this number. [5] xx 7: xx 8: xx 9: British Indian Ocean Territory +246: 380 7 387 British Virgin Islands +1: 284: 10